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Re: claimed completion on "ACTION-233: Publish the consolidated test suite"

From: Gregg Kellogg <gregg@greggkellogg.net>
Date: Thu, 21 Mar 2013 07:38:08 -0700
Message-Id: <7F071517-1A60-48E9-B802-8CC87D07AAE9@greggkellogg.net>
Cc: "public-rdf-wg@w3.org" <public-rdf-wg@w3.org>
To: Andy Seaborne <andy.seaborne@epimorphics.com>
On Mar 21, 2013, at 3:47 AM, Andy Seaborne <andy.seaborne@epimorphics.com> wrote:

> 
> 
> On 21/03/13 03:51, Eric Prud'hommeaux wrote:
>> RDF and I18N folks, we have an interesting situation where we permit
>> U+F900-U+FA0D to appear in local names, but advise against anything
>> which is not NFC. So, what do we test?
> 
> The grammar is wider than the acceptable URIs in several places - it's inevitable.  We're expecting URI checking to be done after parsing in a very strict implementation.
> 
> So test good practice and recognize that not everywhere is completely up-to-date on everything.

+1

Gregg

>    Andy
> 
>> Everything a Turtle parser
>> could encouter? Currently assigned characters that are in NFC?
>> Identifiers consisting of a single letter 'a', under the assumption
>> that all others will work by extension?
>> 
>> 
>> * Gavin Carothers <gavin@carothers.name> [2013-03-20 13:17-0700]
>>> http://www.unicode.org/charts/PDF/U1F00.pdf U+1FFF is not a character.
>>> http://www.unicode.org/charts/PDF/U2150.pdf U+218F is not a character.
>>> No chart for code point U+2FEF could be located. Most likely this is
>>> because no character is assigned to this code point yet.
>>> http://www.unicode.org/charts/PDF/UD7B0.pdf U+D7FF is not a character.
>>> http://www.unicode.org/charts/PDF/UFB50.pdf U+FDCF is not a character.
>>> No chart for code point U+EFFFF could be located. Most likely this is
>>> because no character is assigned to this code point yet
>>> 
>>> 
>>> New string based on the above missing characters tested in Python 3.3
>>> (earlier versions of python not supported, only one with Unicode 6.1.0)
>> 
>> I banged briefly on finding an ubuntu package for Python 3.3
>> (currently at 3.2). Ended up with something called perl. sigh.
>> 
>> use Unicode::Normalize;
>> $s = "AZaz\x{00c0}\x{00d6}\x{00d8}\x{00f6}\x{00f8}\x{02ff}\x{0370}\x{037d}\x{0384}\x{1ffe}\x{200c}\x{200d}\x{2070}\x{217f}\x{2c00}\x{2fcf}\x{3001}\x{d7fb}\x{f900}\x{fdc7}\x{fdf0}\x{fffd}\x{00010000}\x{0001f52b}";
>> p $s cmp NFC($s);
>> => 1 -- strings are different. so now to look for the first candidate:
>> 
>> for (0xf900..0xfdcf) {
>>     if (ord(Unicode::Normalize::NFC(chr($_))) == $_) {
>>         printf("%x\n", $_);
>>         last;
>>     }
>> }
>> => fa0e
>> 
>> # checked with
>> $s = "AZaz\x{00c0}\x{00d6}\x{00d8}\x{00f6}\x{00f8}\x{02ff}\x{0370}\x{037d}\x{0384}\x{1ffe}\x{200c}\x{200d}\x{2070}\x{217f}\x{2c00}\x{2fcf}\x{3001}\x{d7fb}\x{fa0e}\x{fdc7}\x{fdf0}\x{fffd}\x{00010000}\x{0001f52b}";
>> p $s cmp NFC($s);
>> => 0 -- equivalent
>> 
>> The currently unassigned characters don't impact NFC:
>> $s = "AZaz\x{00c0}\x{00d6}\x{00d8}\x{00f6}\x{00f8}\x{02ff}\x{0370}\x{037d}\x{037f}\x{1fff}\x{200c}\x{200d}\x{2070}\x{218f}\x{2c00}\x{2fef}\x{3001}\x{d7ff}\x{fa0e}\x{fdcf}\x{fdf0}\x{fffd}\x{10000}\x{effff}"
>> p $s cmp NFC($s);
>> => 0 -- equivalent
>> 
>> 
>>> import unicodedata
>>> s =
>>> "AZaz\u00c0\u00d6\u00d8\u00f6\u00f8\u02ff\u0370\u037d\u0384\u1ffe\u200c\u200d\u2070\u217f\u2c00\u2fcf\u3001\ud7fb\uf900\ufdc7\ufdf0\ufffd\U00010000\U0001f52b"
>>> 
>>> def display_string(s):
>>> for c in s:
>>> print("""Character: {c!s}
>>> Codepoint: {code:x}
>>> Name: {name}
>>> Combining: {combining}
>>> """.format(
>>> c=c,
>>> code=ord(c),
>>> name=unicodedata.name(c),
>>> combining=unicodedata.combining(c),
>>> ))
>>> 
>>> n = unicodedata.normalize("NFC", s)
>>> 
>>> display_string(s)
>>> print("\n ------------------ \n ")
>>> display_string(n)
>>> 
>>> assert n == s
>>> 
>>> Yeah, they aren't the same. The offending character is f900:
>>> 
>>> CJK COMPATIBILITY IDEOGRAPH-F900 which in normal form is CJK UNIFIED
>>> IDEOGRAPH-8C48
>>> 
>>> Finding something in the F900ish range is left to Eric. Script above can be
>>> modified until it passes.
>>> 
>>> Cheers,
>>> Gavin
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On Wed, Mar 20, 2013 at 12:13 PM, Eric Prud'hommeaux <eric@w3.org> wrote:
>>> 
>>>> * Andy Seaborne <andy.seaborne@epimorphics.com> [2013-03-20 17:36+0000]
>>>>> The TTL has U+037E but ...
>>>>> 
>>>>> PN_CHARS_BASE has a hole specifically for that
>>>>> 
>>>>> [#x0370-#x037D] | [#x037F-#x1FFF]
>>>>> 
>>>>> => not a legal char.
>>>> 
>>>> Yeah, I screwed that up. I should have gone the other way 'cause it's at
>>>> the bottom of a range (unlike all the other unassigned chars). Attached are
>>>> the same tests with s/37f/384/. Could you chop off after the "AZaz" and see
>>>> if that works and do a binary search to see what it's complaining about?
>>>> 
>>>> I18N folks, could you tell me why an NFC validator is objecting to this
>>>> (beautiful) IRI and if there's some validator I can use for testing:?
>>>>   <http://a.example/AZazÀÖØöø˿Ͱͽ΄῾‌‍⁰↉Ⰰ⿕、ퟻ豈ﷇﷰ�𐀀>
>>>> The goal is to test as much as possible the valid input to <
>>>> http://www.w3.org/TR/turtle/#grammar-production-PrefixedName>. In turtle,
>>>> the localName gets appended to the namespace, hence the url above. The
>>>> 
>>>>   [163s] PN_CHARS_BASE ::=    [A-Z] | [a-z] | [#x00C0-#x00D6] |
>>>> [#x00D8-#x00F6] | [#x00F8-#x02FF] | [#x0370-#x037D] | [#x037F-#x1FFF] |
>>>> [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] |
>>>> [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
>>>> 
>>>> production is taken from <http://www.w3.org/TR/REC-xml/#NT-NameStartChar>:
>>>> 
>>>>   [4] NameStartChar ::= ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] |
>>>> [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] |
>>>> [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] |
>>>> [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
>>>> 
>>>> 
>>>> 
>>>>> Removing it (Greek question mark), I then get:
>>>>> 
>>>>> WARN  [line: 2, col: 43] Bad IRI:
>>>>> <http://a.example/AZaz???????????????????????> Code: 46/NOT_NFC in
>>>>> PATH: The IRI is not in Unicode Normal Form C.
>>>>> WARN  [line: 2, col: 43] Bad IRI:
>>>>> <http://a.example/AZaz???????????????????????> Code: 47/NOT_NFKC in
>>>>> PATH: The IRI is not in Unicode Normal Form KC.
>>>>> WARN  [line: 2, col: 43] Bad IRI:
>>>>> <http://a.example/AZaz???????????????????????> Code:
>>>>> 56/COMPATIBILITY_CHARACTER in PATH: TODO
>>>>> 
>>>>> with or without the last char.
>>>>> 
>>>>>> I poked around looking for composing characters in the PN_CHARS_BASE
>>>>>> character ranges. \u02ff MODIFIER LETTER LOW LEFT ARROW seemed like it
>>>>>> could be a culprit, but fileformat.info claims it's not in a combining
>>>>>> class. Likewise \ufffd REPLACEMENT CHARACTER
>>>>>> 
>>>>>> There are a bunch of yet-unassigned characters which could be confusing
>>>>>> a vigilent IRI checkr. I've mapped those to the highest currently-
>>>>>> assigned characters in their respective range (per fileformat.info):
>>>>>> 
>>>>>>     \u037f   37e
>>>>>>     \u1fff  1ffe
>>>>>>     \u218f  2189
>>>>>>     \u2fef  2fd5
>>>>>>     \ud7ff  d7fb
>>>>>>     \ufdcf  fdc7
>>>>>> \U000effff e01ef
>>>>>> 
>>>>>> attached is a variant of
>>>>>>   localName_with_PN_CHARS_BASE_character_boundaries.{nt,ttl}
>>>>>> with the values substituted. (I pass this modified test so there
>>>>>> shouldn't be any typos in it.) If it still doesn't work, try chopping
>>>>>> off the last character 'cause it's a variation selector which ostensibly
>>>>>> is NF{,K}{C,D} valid, but may not have been when jjc wrote your checker.
>>>>>> 
>>>>>> 
>>>>> 
>>>> 
>>>> --
>>>> -ericP
>>>> 
>>>> 
>> 
> 
Received on Thursday, 21 March 2013 14:38:43 UTC

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